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Patented May 19, 1931 UNITED STATES PATENT OFFICE ROBERT GBIESSBAGH OTTOBROS, O! LUDWIGBHAFEN-ON-THE-Bm emmY, ASBIGNOBS TO I. G. FABBENINDUSTBIEAKTIENGESELLSGHAIT, OF rm- IOBT-ON-THE-KAIH,.GERHANY, ACORIEOBATION OIGERMANY I cam roman 80 Drawing. Application filed January 4 1928,Seth-1' No. 244,558, and in Germany. January 8, 1887.

The production of valuable cattle fodder from micro or anisms, such asyeast, is rendered difiicult the instability of the prodnets and by thedifficulties in producing a nudigested ter of excellent durability and ahigh nutritive value is obtained if micro organisms containing albumen,for example varieties of yeasts, be subjected to autolysis by means ofagents destroying the cells of' the said micro organisms an thusenabling the degradation of all or part-of the albumen by means of theenzymes, and the resulting products be then cautiously dryed after theneutralization of the acids formed by means of ammonia. V

The products of albumoses, peptones and the like and of ammonium saltsof the amino acids produced and are readily resorbed by the digestivesystem of The sharp taste of the products of the autolysis is removed bythe neutralization with ammonia and, inthe dry state, the roductspossess an agreeable flavour resembling that of cheese.

In the said 'pr the neutralization is preferably commenced only sometime after the liquefaction of the mass has set in. Byv this method ofworking the action of thet tic com ,unds is assisted by the weak aci sforme during the autolysis, whilst the neutralization following later onproduces the best conditions for the degradation of the peptones by theereptic compounds of the yeast. On performing the autolysis in themanner described a quick de adation of the albumines of the yeast'is otained and the 1 de of the degradation ,and the-composition of theresulting products may be varied in rather wide limits according to thealteration of the speed of neutralization. Thus, for example, higheramounts of lower degradation products prevail, if the neutralization heproceeded with very slowly.

The nature of this invention will be further illustrated by thefollowing example but the inventionsis not restricted thereto. The partsare by weight.

obtained consist of mixtures- Ewample I 200 parts of yeast (with a watercontent of about 70 per cent) are mixed at room temperature with about10 parts of ethyl acetate and, after the liquefaction of the mass hasset in, are intensely stirred for about 10 gen content of about 9.2 percent, of which 49 per cent of the total mass is digestible protein,according to the hydrochloric acid-pepsin test, and of cheese.

What we claimis:

1. A process for the production of feeding matter for animals whichcomprises degradating micro organisms by autolysis, neutralizing theacids formed with ammonia and cautiously the product.

2. A proces or the prod ction of feeding matter for animals whichcomprises degradating yeast by autolysis, neutralizing the possesses anagreeable flavour acids formed with ammon a and cautiously drying theroduct.

3. f g matter for animals comprising a mixture of ammonium salts of theamino acids from the autolysis of micro organisms. p

4. A feeding matter'for animals comprising a mixture of ammonium saltsof the amino acids from the autolysis of yeast.

In testimony whereof we have hereunto set our hands.

ROBERT GRIESSBACH. OTTO AMBROS. v

